linux-kernel - Re: [PATCH 0/3] AHCI: sunxi: Add sunxi AHCI driver

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Message-ID: <529F1C88.5070701@schinagl.nl>
Date:	Wed, 04 Dec 2013 13:14:00 +0100
From:	Olliver Schinagl <oliver+list@...inagl.nl>
To:	oliver@...inagl.nl
CC:	tj@...nel.org, grant.likely@...aro.org, rob.herring@...xeda.com,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, dev@...ux-sunxi.org,
	maxime.ripard@...e-electrons.com, ijc@...lion.org.uk,
	hdegoede@...hat.com
Subject: Re: [PATCH 0/3] AHCI: sunxi: Add sunxi AHCI driver

And I've spotted my first mistake (one of many I'm sure) I typo'ed Rob's 
e-mail address. Sorry Rob.

Oliver

On 04-12-13 13:10, oliver@...inagl.nl wrote:
> From: Olliver Schinagl <oliver@...inagl.nl>
>
> This patch series adds Allwinner sunxi support to platform_ahci.
> There are a few quirks here however that will need discussing.
>
> Allwinner added something to setup the DMA engine prior to enabling DMA in
> libahci.c. I'm not familiar at all with the AHCI spec and not sure what
> the proper way to implement this would have been. Don't other platforms
> optionally require the same thing?
>
> Also the way ahci_platform works seems a little hack-ish, it seems like
> something along the lines of ahci_platform_register(ahci-data) would be more
> appropriate, but not sure yet on those details (I am just a beginner).
>
> Furthermore this driver should, in theory, work on the A10 but on my
> cubieboard 1 it does not work yet (just hangs somewhere in libahci or after,
> but not the DMA call that was altered). I've also tested it the cubietruck,
> cubieboard 2 and olinuxino and it worked fine there.
>
> Thanks,
>
> Oliver
>
> Oliver Schinagl (3):
>    RFC: AHCI: libahci is missing DMA
>    ARM: sunxi: Add an ahci-platform compatible AHCI driver for the
>      Allwinner SUNXi series of SoCs
>    ARM: sunxi: dts: Add ahci support to a few A10 and A20 boards
>
>   .../devicetree/bindings/ata/ahci-sunxi.txt         |  24 ++
>   arch/arm/boot/dts/sun4i-a10-cubieboard.dts         |  26 ++
>   arch/arm/boot/dts/sun4i-a10.dtsi                   |   9 +
>   arch/arm/boot/dts/sun7i-a20-cubieboard2.dts        |  26 ++
>   arch/arm/boot/dts/sun7i-a20-cubietruck.dts         |  26 ++
>   arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts    |  26 ++
>   arch/arm/boot/dts/sun7i-a20.dtsi                   |   9 +
>   drivers/ata/Kconfig                                |   9 +
>   drivers/ata/Makefile                               |   1 +
>   drivers/ata/ahci.h                                 |   6 +
>   drivers/ata/ahci_platform.c                        |  12 +
>   drivers/ata/ahci_sunxi.c                           | 305 +++++++++++++++++++++
>   drivers/ata/libahci.c                              |   8 +
>   13 files changed, 487 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/ata/ahci-sunxi.txt
>   create mode 100644 drivers/ata/ahci_sunxi.c
>

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